Paleophycology of Long Lake, Saint John County, New Brunswick, Canada, based on diatom distribution in sediments

1992 ◽  
Vol 70 (2) ◽  
pp. 229-239 ◽  
Author(s):  
David J. Rawlence
Keyword(s):  
New Brunswick ◽  
Younger Dryas ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Mineral Layer ◽  
Climatic Oscillation ◽  
The Core ◽  
Asterionella Formosa ◽  
Diatom Communities ◽  
Climatic Cooling

The succession of postglacial diatom communities was determined in a 5.98 m core from Long Lake, New Brunswick, Canada. The base of the core was dated at 12 200 ± 150 BP. Five major communities were identified: (zone A) from the base to 520 cm, a pioneer Fragilaria/Cyclotella association; (zone B) from 520 to 380 cm, commencing ca. 10 000 BP, a Melosira ambigua/Synedra ulna/Cyclotella/Asterionella community; (zone C) from 380 to 260 cm, a Fragilaria pinnata/Cyclotella pseudostelligera/Tabellaria flocculosa community; (zone D) from 260 to 80 cm, an Asterionella formosa/Cyclotella pseudostelligera/Fragilaria pinnata/Tabellaria flocculosa v. flocculosa community; followed by (zone E) in the upper 80 cm, an Asterionella formosa/Cyclotella meneghiniana/Fragilaria pinnata/Cyclotella pseudostelligera community corresponding with the period of the modern spruce–hardwood community on land. The period of greatest change in the limnic community (zone D) appears to correspond to the period of greatest change in the terrestrial flora, and the mid Holocene Hypsithermal warm peak. The Younger Dryas climatic cooling (ca. 11 000 – 10 000 BP) is preceded by the development of a Fragilaria pinnata/Fragilaria construens/Cyclotella stelligera community, followed by an Ellerbeckia arenaria v. teres biozone, although the Younger Dryas sediments are actually devoid of diatoms. There is evidence of some climatic oscillation following the Younger Dryas period, and some evidence that the climatic cooling began prior to deposition of the mineral layer widely associated with the Younger Dryas throughout the Maritime Provinces of Canada. Key words: paleophycology, diatoms, Younger Dryas, eastern Canada.

HEAD CAPSULE MEASUREMENTS OF THE LARCH SAWFLY, PRISTIPHORA ERICHSONII (HYMENOPTERA: TENTHREDINIDAE) IN KOUCHIBOUGUAC NATIONAL PARK, NEW BRUNSWICK

1980 ◽  
Vol 112 (1) ◽  
pp. 111-112 ◽  
Author(s):  
Patrick Maltais
Keyword(s):  
New Brunswick ◽  
Prince Edward Island ◽  
National Park ◽  
Developmental Stages ◽  
Head Capsule ◽  
Larix Laricina ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Pristiphora Erichsonii ◽  
Larch Sawfly

The larch sawfly, Pristiphora erichsonii (Htg.), is a serious defoliator of trees of the genus Larix and particularly of Larix laricina (Du Roi) K. Koch in eastern Canada. According to Reeks (1954), four outbreaks occurred in the Maritime Provinces between 1883 and 1942. Following the last outbreak, few specimens of the insect were found in New Brunswick, Nova Scotia, and Prince Edward Island until 1960 when an outbreak started near Fredericton, New Brunswick. Since, outbreaks varying in degree from moderate to severe have persisted throughout this province.In the course of a study on the ecology and population dynamics of the insect it was found necessary to verify and separate the various developmental stages of the larvae.

scholarly journals Alethopteris and Neuralethopteris from the lower Westphalian (Middle Pennsylvanian) of Nova Scotia and New Brunswick, Maritime Provinces, Canada

2020 ◽  
Vol 56 ◽  
pp. 111-145
Author(s):  
Carmen Álvarez-Vázquez
Keyword(s):  
United States ◽  
Nova Scotia ◽  
New Brunswick ◽  
Western Europe ◽  
The United States ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Systematic Revision ◽  
Insufficient Attention ◽  
The North

A systematic revision of Alethopteris and Neuralethopteris from upper Namurian and lower Westphalian (Middle Pennsylvanian) strata of Nova Scotia and New Brunswick, eastern Canada, has demonstrated the presence of eight species: Alethopteris bertrandii, Alethopteris decurrens, Alethopteris cf. havlenae, Alethopteris urophylla, Alethopteris cf. valida, Neuralethopteris pocahontas, Neuralethopteris schlehanii and Neuralethopteris smithsii. Restudy of the Canadian material has led to new illustrations, observations and refined descriptions of these species. Detailed synonymies focus on records from Canada and the United States. As with other groups reviewed in earlier articles in this series, it is clear that insufficient attention has been paid to material reposited in Canadian institutions in the European literature. The present study emphasizes the similarity of the North American flora with that of western Europe, especially through the synonymies.

The millipeds of eastern Canada (Arthropoda: Diplopoda)

1988 ◽  
Vol 66 (7) ◽  
pp. 1638-1663 ◽  
Author(s):  
Rowland M. Shelley
Keyword(s):  
Nova Scotia ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Southern Ontario ◽  
The Family ◽  
The Common ◽  
Total Fauna

The diplopod fauna of eastern Canada, an area containing all or parts of Ontario, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland, consists of 6 orders, 15 families, 28 genera, and 38 species. Eighteen species, 47% of the total fauna, are synanthropic forms introduced chiefly from Europe, and 11 additional millipeds, including another order and family, may occur there, particularly in southern Ontario. The sole Canadian records of Polyzonium mutabile Causey, Aniulus paludicolens Causey, Uroblaniulus stolidus Causey, Pseudopolydesmus branneri (Bollman), Scytonotus granulatus (Say), and Pleuroloma flavipes Rafinesque; the genera Cleidogona, Scytonotus, and Pleuroloma; and the family Cleidogonidae are from Ontario. Pleuroloma flavipes and Uroblaniulus stolidus, in Essex and Algoma counties, are newly recorded from Canada. Polyxenus lagurus (L.), Underwoodia iuloides (Harger), and Trichopetalum lunatum Harger are the only native diplopods in the Maritime Provinces, and Allajulus caeruleocinctus (Wood), a Palearctic introduction, is the only species known from New Brunswick and Prince Edward Island. The combination Polyzonium cryptocephalum (McNeill) is revived for the dominant eastern polyzoniid species, and Petaserpes rosalbus Cope and Polyzonium divaricatum Loomis are recognized as synonyms of it, the latter being new. Other new synonymies are Polyzonium borealis Loomis and P. quadricauda Loomis with P. mutabile Causey; Julus immaculatus Wood and Parajulus dux Chamberlin with Uroblaniulus canadensis (Newport); and Underwoodia polygama Cook and Collins with U. iuloides. Apheloria virginiensis (Drury), n.comb., is proposed as are subspecific statuses for the common eastern spirobolid millipeds. American species improbable for eastern Canada are identified, and a key to known and potential taxa and pertinent anatomical drawings are provided.

The Catamaran Fault, North-Central New Brunswick

1972 ◽  
Vol 9 (10) ◽  
pp. 1278-1286 ◽  
Author(s):  
F. D. Anderson
Keyword(s):  
New Brunswick ◽  
Compressive Stress ◽  
Middle Devonian ◽  
Fracture Analysis ◽  
Strike Slip ◽  
Maritime Provinces ◽  
North Central ◽  
The Core ◽  
Principal Compressive Stress ◽  
Metamorphic Core

The Catamaran Fault cuts pre-Carboniferous rocks of the Miramichi Geanticline in north-central New Brunswick. It has been examined for about 60 miles (100 km) across the intrusive and metamorphic core of the geanticline and into the Siluro-Devonian flank rocks. The fault strikes easterly in the core and northeasterly in the flanks.Where displacement could be determined movement on the fault is mainly right lateral strike-slip. There is no evidence for major dip-slip. Fracture analysis indicates that faulting was in response to a northwest-southeast trending principal compressive stress similar to that deduced for other faults in the Maritime Provinces. Latest movement along the fault was post-Middle Devonian (i.e. post-dates the emplacement of the Acadian granite) and pre-Pennsylvanian.The Catamaran Fault may extend eastward along a fault possibly underlying Miramichi Bay and continuing under the Gulf of St. Lawrence, and westward along a southwesterly trending fault in western New Brunswick. As such the Catamaran Fault may exceed 250 miles (400 km) in length.

scholarly journals Status of the European race of Scleroderris canker in Canada

1998 ◽  
Vol 74 (4) ◽  
pp. 561-566 ◽  
Author(s):  
G. Laflamme ◽  
A. A. Hopkin ◽  
K. J. Harrison
Keyword(s):  
New Brunswick ◽  
Pinus Resinosa ◽  
Pine Forests ◽  
Pine Plantation ◽  
White Pine ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
European Race ◽  
Avalon Peninsula ◽  
The Eu

The European (EU) race of Gremmeniella abietina (Lagerb.) Morelet, the causal agent of scleroderris canker of conifers, is a damaging pathogen in pine forests. In North America, this disease is found in the northeastern United States and in eastern Canada. Results from surveys conducted across Canada since 1979 are updating us on where this disease is found. In Newfoundland, only the EU race has been recorded and it is restricted to the Avalon Peninsula Contrary to earlier reports in the Maritime provinces, only one pine plantation is infected by the EU race in New Brunswick. In Ontario, a total of 171 plantations are infected and they are clustered in the central portion of the southern part of the province. The number of plantations infected by the EU race in Quebec is the highest in Canada with 749 plantations. In the four provinces, the most infected species is red pine (86% of the infected plantations), followed by two exotic species, Scots pine (9.5%) and Austrian pine (3.2%). White pine and jack pine show resistance to the disease. Key words: Brunchorstia pinea, Pinus resinosa, reforestation, Scleroderris lagerbergii

Evidence for genetic hybridization between Ixodes scapularis and Ixodes cookei

2017 ◽  
Vol 95 (8) ◽  
pp. 527-537 ◽  
Author(s):  
James W. Patterson ◽  
Anna M. Duncan ◽  
Kelsey C. McIntyre ◽  
Vett K. Lloyd
Keyword(s):  
Mitochondrial Dna ◽  
Genetic Analysis ◽  
New Brunswick ◽  
Nuclear Dna ◽  
Ixodes Scapularis ◽  
Companion Animals ◽  
Genetic Introgression ◽  
Eastern Canada ◽  
As Species ◽  
Intermediate Traits

Ixodes scapularis Say, 1821 (the black-legged tick) is becoming established in Canada. The northwards expansion of I. scapularis leads to contact between I. scapularis and Ixodes cookei Packard, 1869, a well-established tick species in Eastern Canada. Examination of I. cookei and I. scapularis collected from New Brunswick revealed ticks with ambiguous morphologies, with either a mixture or intermediate traits typical of I. scapularis and I. cookei, including in characteristics typically used as species identifiers. Genetic analysis to determine if these ticks represent hybrids revealed that four had I. cookei derived mitochondrial DNA but I. scapularis nuclear DNA. In one case, the nuclear sequence showed evidence of heterozygosity for I. scapularis and I. cookei sequences, whereas in the others, the nuclear DNA appeared to be entirely derived from I. scapularis. These data strongly suggest genetic hybridization between these two species. Ixodes cookei and hybrid ticks were readily collected from humans and companion animals and specimens infected with Borrelia burgdorferi Johnson et al., 1984, the causative agent of Lyme disease, were identified. These findings raise the issue of genetic introgression of I. scapularis genes into I. cookei and warrant reassessment of the capacity of I. cookei and I. cookei × I. scapularis hybrids to vector Borrelia infection.

Studies of Predators of the Balsam Woolly Aphid, Adelges piceae (Ratz.) (Homoptera: Adelgidae): XI. Cremifania nigrocellulata Cz. (Diptera: Chamaemyiidae), An Introduced Predator in Eastern Canada

1962 ◽  
Vol 94 (11) ◽  
pp. 1171-1175 ◽  
Author(s):  
R. C. Clark ◽  
N. R. Brown
Keyword(s):  
Biological Control ◽  
New Brunswick ◽  
Eastern Canada ◽  
Introduced Predator ◽  
Woolly Aphid ◽  
Commonwealth Institute ◽  
Adelges Piceae ◽  
Research Institute

Cremifania nigrocellulata Cz. is one of the complex of predators that attacks A. piceae (Ratz.) in Europe. After studies on its morphology, biology, and distribution were made by Delucchi and Pschorn-Walcher (1954), C. nigrocellulata was reared in Europe by the Commonwealth Institute of Biological Control and introduced into New Brunswick via the Entomology Research Institute for Biological Control, Belleville, Ontario.

CLAY ILLUVIATION IN SOME ORTHIC PODZOLS OF EASTERN CANADA

1965 ◽  
Vol 45 (2) ◽  
pp. 127-138 ◽  
Author(s):  
J. E. Brydon
Keyword(s):  
Organic Matter ◽  
New Brunswick ◽  
Iron Oxides ◽  
Clay Content ◽  
Granular Structure ◽  
Charge Component ◽  
Eastern Canada ◽  
Free Iron ◽  
Fine Clay ◽  
Ph Dependent

The Arago, Barney, and Holmesville soils, Podzols from Quebec, Nova Scotia, and New Brunswick, respectively, each had friable Bfh horizons with moderate granular structure, and with organic matter and free Fe2O3 contents greater than the Ae and C horizons. The Arago and Holmesville had thin Bhft horizons containing over 10% organic matter and 5% free iron oxides. The C horizons of these two soils had some features characteristic of fragipans.The B horizons of the three soils had a high "pH-dependent charge component" in the C.E.C. values. The "permanent charge component" was similar throughout the Arago profile except for the Bhft horizon where clay accumulation had occurred.Translocation of clay from the Ae to the upper B horizons was indicated by the twofold increase in clay content and the relative enrichment of fine clay in the B horizons. Removal of free iron affected the clay contents differently in the different: horizons but the maximum clay content in the upper B horizons remained. The definitions of Orthic Podzols, Textural Podzols, and t horizons should be re-examined.

scholarly journals Die spät- und frühpostglaziale Vegetationsentwicklung im Umkreis der Alpen. Bemerkungen zur Arbeit von H. Zoller: „Pollenanalystische Untersuchungen zur Vegetationsgeschichte der insurbischen Schweiz“, 1960

1962 ◽  
Vol 12 (1) ◽  
pp. 9-17
Author(s):  
Gerhard Lang
Keyword(s):  
Younger Dryas ◽  
Late Glacial ◽  
Climatic Oscillation ◽  
Northern Border ◽  
The Alps ◽  
Southern Border

Abstract. Based upon newer papers a brief summary is given on Late-glacial and Pre-boreal vegetational history at the western and northern border of the Alps; the effects of the Bölling- and especially the Alleröd-oscillation are demonstrated. Proceeding of that the different results by H. Zoller (I960) in Southern Switzerland are examined and the arguments for another dating of his two Late-glacial pollen diagramms are discussed. According to that the first afforestation in the lowlands at the southern border of the Alps occured not in the Allerod but already in the Boiling period; the „Piottino-oscillation", associated with the Gschnitz-Stadium, is probably not a new discovered Pre-boreal climatic oscillation, but corresponds to the Alleröd-oscillation. Therefore it seems not necessary to doubt the synchronism of Younger Dryas and Schlußvereisung in the Alps.

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